//計算器類 class Calculator{ private int num1; //操作數1 private int num2; //操作數2 private char option ; //運算符 //提供公共的方法設置屬性值.... public void initCalculator(int num1,int num2,char o){ this.num1=num1; this.num2=num2; if(o==‘+‘||o==‘-‘||o==‘*‘||o==‘/‘){ option = o; }else{ option = ‘+‘; } } //計算的功能 public void calculate(){ switch(option){ case ‘+‘: System.out.println("做加法運算,結果是："+(num1+num2)); break; case ‘-‘: System.out.println("做減法運算,結果是："+(num1-num2)); break; case ‘*‘: System.out.println("做乘法運算,結果是："+(num1*num2)); break; case ‘/‘: System.out.println("做除法運算,結果是："+(num1/num2)); break; } } }

java簡單計算器